Refrigerating apparatus.



W. P. DAVIS.

REFBIGERATING APPARATUS.

APPLICATION FILED 001214, 1912.

Patented. Aug". 19, 1913.

for instance, liquid ammonia, being 'deliv UNITED sT Ins PATENT FFC.

WILLIAM F..DAVIS, OF PORTLAND, OREGON, ASSIGNOR TO UNIVERSAL REFRIGERAT- ING COMPANY, OF PORTLAND, OREGON.

REFRIGERATING APPARATUS.

Original application filed July 23, 1912,

To all whom it may concern.

Be it known that I, WILLIAM F. DAVIS, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Refrigerating Apparatus, of which the following is a specification.

This invention relates to improvements in refrigerating apparatus, and more particularly to evaporators for refrigerating systems.

An object in view is the effective distribution of liquid refrigerant for enhancing evaporation and facilitating disposal of volatilized gases.

lVith this and other objects in view, as will hereinafter in part be set forth and in part become apparent, the invention comprises certain novel constructions, combinations and arrangements of parts as herein specified and claimed.

In the accompanying drawings, Figure 1 is a view partly in elevation, and partly in section of an evaporator embodying the features of the present invention. Fig. 2 is a transverse vertical section taken therethrough on the plane indicated by line 22 of Fig. 1. Fig. 3 is a view in side elevation of a modified embodiment of the evaporator.

Referring to the drawings by numerals, 1 indicates the liquid refrigerant supply pipe which leads from the condenser of a refrigerating system, and discharges into a tubuar separating drum 3, the refrigerant, as

ered through the pipe 1 to the drum in sufficient quantities to substantially maintain the liquid level in the drum approximately on the level with the uppermost portion of the bore of the discharge end of the tube 1. Headers 4 and 5am arranged at the opposite ends of the drum 3, the header 1 communicating with the drum by a tube 6 which enters the drum below the said liquid level, and the header 5 communicating with the drum by a tube 7 which enters the drum above said liquid level. The headers 4 and 5 preferably depend from the drum substantially vertically and are connected by inclined tubular members or pipes 8, 8, each pipe 8 being inclined upwardly from the header 4 to the header 5. A gas discharge pipe 9 leads from the drum 3, preferably Specification of Letters-Patent.

Patented Aug. 19', 1913.

Serial No. 711,110. Divided and this application filed October 14, 1912. Serial N 0. 725,622.

from the end thereof through which the pipe 6 extends, said pipe 9 being disposed preferably above the liquid level in the drum, and being arranged to extend to and communicate with the compressor of a refrigerating system.

In operation, a liquid refrigerant is delivered through pipe 1 in a ratio proportionate to the evaporation occurring within the evaporator which obviously is in turn proportionate to the heat units absorbed by the refrigerant, andthe quantity of such heat units so absorbed is, of course, proportionate to the surface exposure of the refriger erant so that a relatively large area of surface exposure afforded by the inclined members 8 provides for a relatively rapid evaporation with the resul't-ant maintenance of low temperature. The liquid refrigerant entering the drum 3 from the discharge end of pipe 1 maintains the liquid level, and by gravitation descends through pipe 6 and header 4 to the several inclined tubes 8, and rises in the header 5 up to the liquid level within the tank 3. The absorption of heat units by the liquid refrigerant within the tubes 8 and headers will cause the liquid refrigerant to boil and the. re-

It is apparent therefore, that the present improved evaporator takes advantage of natural circulation and provides maximum efficiency in the disposition of volatilized productsNdA brine tank 10 surrounds the "evaporator for continuing the low temperature after the operation of the refrigerating machlne has ceased".

In Fig. 3 is illustrated a modified embodiment of the invention in which tubes 3", 3 connected at various points by tubes 3" subserve the functions of the drum 3, headers l" and 5 communicating with the tubes 3 at their ends and the headers being connected .by inclined tubes 8 to operate as above de-- scribed with respect to the corresponding elements of the structure as seen in Fig. 1. A supply pipe 1 communicates with the lower pipe 3 at one end and discharge pipe 9 communicates with the upper pipe 3 at the outer end so that the liquid level is maintained preferably approximately at the uppermost portion of the lower pipe 3, While the upper pipe 3 serves as a gas reservoir into which volatilized gas may escape on its way to the discharge tube 9 through which it passes to the compressor of the system in the continued cycles of operation.

This application is a division of my copending application, Serial No. 711,110, filed July 2-3, 1912.

Having thus described the invention, what is claimed as new is:

1. In a refrigerating machine, an evaporator comprising tubular circulating members through which a liquid refrigerant is adapted to circulate, a separator, a connection between the lower portion of the separator and said refrigerating members, a con nection between the upper portion of the separator and the refrigerating members, and a gas outlet leading from the uppermost portion of the separator.

2. An evaporator for refrigerating machines comprising an inclined tubular refrigerating member, a separator, means for supplying a liquid refrigerant to said separator, a connection between one end of the refrigerating member and the lower portion of said separator. a connection between the other end of the refrigerating member and the upper portion of the separator, and a gas outlet leading from the uppermost portion of the separator.

3. An evaporator for refrigerating machines comprising spaced headers, a plurality of tubular refrigerating members connected to said headers, a separator, a connection between one of the headers and the uppermost portion of the separator, a connection between the other header and the lowermost portion of the separator, a gas outlet communicating with the lowermost portion of the separator, and means for supplying a refrigerant to the separator intermediate the uppermost and lowermost portions of the latter.

1. In an evaporator, the combination of a separator tank, spaced headers, one communicating with the lower portion of said tank, and the other communicating with the upper portion thereof, evaporating means connecting the headers, a supply tube communicating with the separator tank below the point of communication of one of the headers and above the point of communication of the other, and a discharge tube communicating with the separator above the point of communication of said supply tube.

In testimony whereof I afix my signature in presence of two witnesses.

WILLIAM F. DAVIS.

\Vitnesses 1F. H. IVHITFIELD, R. STEINBERG. 

